Metrohm 794 Basic Titrino - Manual (Page 24)

2.4. Tutorial
794 Basic Titrino
20
After the second titration you receive a printout with statistics calculations:
If you have no printer connected, you can view the mean value and standard deviation:
• Press <SELECT> until "display mean" appears in the display.
• With <ENTER> you obtain the mean value.
• A second <ENTER> displays the number of single values which have been used for
the mean calculation.
• If you press <SELECT> again, the display "display std.deviation" appears. Once
again, you can view this value, by pressing <ENTER>.
Perhaps you have noticed that the two values differ too greatly? In any case, we shall per-
form a third determination with the same sample. The result of this determination will be
another value which is incorporated in the statistics calculations.
Addition of more determinations for the statistics calculations
5 × <PARAM>
<ENTER>
<ENTER>
<3>
<ENTER>
2 × <QUIT>
• Press <PARAM> until the display shows:
• Statistics calculations can be switched on either with
the <STATISTICS> key or in the inquiry "status:".
We shall leave them switched on and proceed to the
next inquiry.
Mean value of 2 single determinations.
• Enter "3" to include an additional determination.
• Quit the inquiry.
Perform another titration.
parameters
>statistics
>statistics
status: ON
>statistics
mean: n= 2
'fr
794 Titrino 01102 794.0010
date 2002-01-03 time 17:34 3
pHc(init) 6.29 SET pH ********
EP1 0.0628 ml 4.26
m value 5.02 mmol/l
mean(2) +/s s/%
m value 5.04 0.028 mmol/l 0.56
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